Machine for turning and binding the edges of leather



April 20, 1948. l.. J. NoEcKER 2,440,113

MACHINE FOR TURNING AND BINDING THE EDGES OF LEATHER Filed Aug. 12, 19462 Sheets-Sheet 1 36 6 5 ,'42 4?/ 3 3f if i@ MACE-HNE FOR TURNING ANDBINDING THE EDGES OF LEATHER 4Z f 36 .f

April 20, L. J. NOECKER Filed Aug. l2, 1946 2 Sheets-Sheet 2 PatentedApr. 20, 1948 MACHINE FOR TURNING AND BINDING THE EDGES OF LEATHER LouisJ. Noecker, St. Clair, Mo.

Application August 12, 194.6, Serial No. 689,897

The present invention relates generally to a machine for use,particularly, in the shoe industry. It is an improvement over the typeillustrated and described in Letters Patent No. 2,198,456, granted to meon April 23, 1940.

Broadly, therefore, the general objects of this invention are analogousto those set forth in my said patent. The attainment of these objects,however, with the mechanism of the present invention, is greatlyfacilitated, and imperfect turning and binding operations are reduced toa minimum.

The turning and binding operations referred to obtain in the shoe andkindred leather goods industries, where pieces of leather of variouscontours, and which present a raw or unfinished edge or edge portions,are turned or folded inwardly and permanently bound against the mainbody portion of the leather, with the result that the unfinished edgeportions are transformed into smooth, finished edges.

In carrying out the invention, a quick-drying adhesive is applied to anarrow marginal portion of the leather along the raw or unfinished edgeprior to submitting the piece to the action of the machine. There themarginal edge is turned or folded in and bound by pressure, all in onecontinuous cycle, against the main body of leather, so that when thepiece is removed from the machine the former raw edge has been replacedby a smooth, finished edge which is permanent and requires no stitching,except for ornamental purposes, if desired.

In my said patent, a forming die provided with a resilient blade whichterminates in an inwardly curved lower edge performs the dual functionof initially creasing the leather adjacent the raw edge thereof on afirst downward str-oke of said V blade, and then applying pressure tothe folded edge on a second downward stroke f the blade, in cooperationwith a stationary forming block assembly and a vertically recipr-ocablepressure plate.

In other words, without entering into a lengthy description of theoperation set forth in detail in said patent, it may be said that thefinished edge is produced by pressure exerted against the folded portionfrom above; 'that is to say, the turned adhesively coated marginalportion of the leather is pressed firmly against the body portionthereof.

The improved mechanism of the present invention is characterized by anoperative action which applies the pressure from below. That is to say,the body portion of the leather piece adjacent 1o anims. (o1. 69-1) thecoated raw marginal edge is pressed firmly against the latter in asingle stroke.

Further, the curved lower edge of the resilient blade referred to isdispensed with, the blade of the present invention having creasingfunctions only.

Again, the vertically reciprocable pressure plate of said patent,although in a sense retained, in the present mechanism, functions in adifferent manner, as does the forming block mounted thereon.

The most important particular improvement of the instant device,however, resides in a combined anvil and pressure plate member mountedon a vertically reciprocable plunger, which, in cooperation with theblade and forming block of the present invention, produces a moreaccurately and definitely finished edge through the medium of pressureapplied from below, in combination with a flexible or resilientcomponent of said anvil, as will be seen.

All of the moving parts of the machine are so coordinated as to operatein a cycle at the will of the operator. Suitable clutch mechanism isprovided whereby an attendant may cause the moving :components tofunction in proper sequence, and then be automatically arrested inmovement at the end of each cycle.

Pieces of leather of various contours and sizes may be submitted to theaction of the machine, it being necessary only to mount the propercombination of blade, forming block, and anvil, on the verticallyreciprocable parts of the machine. The mounting means for these elementsare finely adjustable so that an extremely accurate setup is obtainable.

Additional advantages and features will be apparent or explained in thefollowing description of the preferred embodiment of the machineillustrated in the accompanying drawings, in which:

Fig. 1 is a side elevational View of the machine as it appears at theend of a cycle, the parts being in position forthe reception of a pieceof leather;

Fig. 2 is a top plan view of Fig. 1;

Fig. 3 is a vertical sectional view taken substantially on the Jline 3-3of Fig. 2; A

Fig. 4 is a front elevational view of the ma chine;

Fig. 5 is a rear `elevational view partly in section, being taken on theline 5--5 of Fig. 1;

Fig. 6 is a similar View taken on the line of Fig. 1;

Fig. 7 is a vertical sectional View taken on the line 'l-T of Fig. 3;

Fig. 8 is a vertical sectional View, on an erllarged scale, of a portionof Fig. 3, a piece of leather being shown in position with a turning andbinding operation cycle being assumed to have just begun;

Figs. 9, 10 and 11 are similar views illustrative of successive steps inthe turning and binding operation cycle;

Fig. 12 isa similar view illustrative of the nnal step in said cycle,the parts being in the position they occupy just prior to the completionof the c cle;

yFig. 13 is a fragmentary view of a piece of leather to one of whosemarginal edges a quickdrying adhesive has lbeen applied, as indicated bystippling;

Fig. 14 is a similar view of the ksame Apiede after it has been actedupon bythe machine of the present invention;

Fig. 15 is a view of a rectangular piece of leather whose `corners havebeen cut oi, and whose four marginal edges have applied thereto aquick-drying adhesive, as indicated by ,stippling;

Fig. 1-6 is a View .of the same piece after it has .been subjected tothe action of my machine;

Fig. 17 is a vertical sectional view taken centrally of .a .combinedanvil and pressure member employed .to obtain the result portrayed AinFig. 16;

Fig. 18 is .a fragmentary view similar to Fig. 14 illustrating afinished edge of a dierent configuration;

Fig. 1,9 is a plan ,view of ia Ileather disc whose peripheral .edge hasbeen finished; and Fig. 20 is a vertical sectional View .of a formingblock employed in the operation producing the result portrayed in Fig.19.

lReferring now more Iparticularly to Figs. 1 to 6, inclusive, it isnoted that some .of .the components embodied in the instant `invention.are simi.- lar to those of said patent, and will therefore be.designated by .the same reference characters herein.

Thus the numeral 33 indicates the base or Work table portion vof themachine, which is provided in. V A,fljaeent the rea-r bearing 35 theshaft has a f Y cam disc 38 aflixed thereto by a set screw .39.

lor-dier to cause shaft 34 to make one complete revolution, and then tobe automatically arrested, a clutch mechanism is provided together withmeans to operate the sa-me. The clutch mechanism, generally designated43, and the foperating means therefor, including a manually oparab-1elever 52. are identi-Cal in `every .respect with the arrangement.illustrated and described in detail in my said patent.

Said clutch mechanism is operable in conjunction with a continuouslyrotating pulley 42, vdriven by a belt 44 from any suitable source ofpower, and at a predetermined speed, all as clearly described in saidpatent.

A vertically reciprocable crosshead 60 operates in guideways 6| formedin the housing 33, plates 62, held in place by screws 63, retaining saidcrosshead in said guideways, as illustrated.

Motion is imparted to the crosshead by means 4 of the cam member 36 incooperation with a roller 64 rotatably mounted on a stud 65 fixed tosaid crosshead, the roller working in the cam groove 31. Unlike thecorresponding cam groove of my patent aforesaid, the instant cam groove31 is circular and eccentric to the shaft 34.

Secured to the lower end of the crosshead by screws or otherwise is ahorizontally disposed plate 6B, provided with means whereby a selectedcreasing blade supporting block may be removably and adjustably mountedthereon.

For example, as illustrated @particularly in Figs. 2., 3, `and 8 to ,12,inclusive, the plate may be pro-4 vided with a narrow longitudinal slot61, through which a screw 68 may pass to enter a threaded :aperture 69in a suitable blade supporting block ,10. Obviously, although only asingle slot 61 is illustrated, more than one slot may be provided intheplate 66.

Secured to the block 10, by screws 1| or in any other manner, is acreasing blade 12 o f relatively thin, spring metal, Whose contour mayassume various shapes, and which in some instances may be .made insections vor provided with serrations if desired.

In the embodiment illustrated, the blade 12 is straight, that is.,adapted to transform the unninished edge portion 13 of the leather 14portrayed in Fig. 13 into the smooth, finished edge portion 1.5illustrated in Fig. 14. In order to produce thesmooth, finished .edges16, shown in Fig. 16, four similar blades secured to a rectangularsupporting block 10 may Ibe utilized, as is understood. A unitary blade,rectangular in top plan, is also feasible. In yorder to produce thefinished .edge 11 of Fig. 18, an arcuate blade 12 would be employed.

To produce ,the finished `edges referred to above, and others notillustrated, it is, of course, neces sary that a `complementary formingblock 18 and a complementary combined anvil and pressure applying member19 be associated with each se- .'lected creasing blade,

The forming block 18 illustrated is adjustably and removably mounted ona vertically recipro- .cable, horizontally disposed plate 86, working ina recess 81 provided therefor in the base 30, as shown. The blockis'provided With a narrow elongated slot ,88 through which a screw 69may pass to enter a threaded aperture in the vplate B6.

The guide block includes a raised gauge portion 9| against which theattendant abuts the unnished edge of leather to be turned, and aprotruding lip portion `9'2 along that upper edge thereof .which ,liesin proximity to the anvil 19.

The plate 86 is formed integrally with, or permanently secured to, avertical plunger |0I, Working in a cylinder |02 secured to the undersideof the base 30 by screws |03. Means for raising and lowering saidplunger include a, lever |011 pivoted at |05 between a pair of ears |06depending from the underside of said base. The lower end portion of theplunger |IJ| is slotted at |01 in alignment -With a vertical slot |08formed in the cylinder |02. The forward end of the lever l| 04, passingthrough the slot |38 and into the slot |01, is pivotally secured to theplunger |1| at |09. 'The other end of the lever has a pivotal connectionwith a vertically disposed bar ||2 on the rear wall of housing 33, whichis held in place :by 'a screw I|3 and a pair of guides I| 4 formed onsaid Wall. The upper end of the bar has a bifurcated portion 5 whichsupports a cam roller |16 on a horizontal pin As shown particularly inFig. 5, the cam 38, previously referred to, is generally circular inform, and is provided with an indented or receding portion ||8. A spring|20, bearing against lever arm |04 at its lower 'end and against theunderside of the base 30 at its upper end, maintains the roller H6 inconstant engagement with the cam 38. A slot |2| in bar H2, through whichscrew ||3 passes, permits vertical movements of the bar 2.

The combined anvil and pressure applying member 19 comprises a solidplate portion |22 and a resilient portion |23, the latter being providedwith a rounded, or somewhat arcuately formed, edge portion |24, asillustrated. The portion |22 is preferably of metal such as brass oraluminum, while the portion |23 is preferably of rubber, or a syntheticequivalent thereof.

As shown in the drawings, the marginal portion of the plate |22 isrecessed or grooved to receive the resilient member |23, the latterbeing permanently bonded thereto. As best seen in Figs. 8 to 12,inclusive, the lower supporting portion |25 of the plate for theresilient component |23 is preferably extended laterally to bettersustain said component when the member 19 funcn tions in its anvilcapacity, as will appear.

The member 19 is removably and adjustably mounted on the upper end of avertical plunger |26 reciprocable in a cylinder |21 depending from saidbase portion 30. To this end, an elongated slot |28 is formed in theplate |22, and a screw |29 may pass therethrough to enter a threadedaperture |30 in the upper end of said plunger.

The lower end of plunger |26 is slotted as at |3| toreceive the forwardend of a lever or arm |32 pivotally connected thereto as at |33. Thelever |32 has a pivotal connection |34 intermediate its ends with thedepending ear members |06, said connection being in vertical alignmentwith but below the pivotal connection |05 of the lever |04.

The other endof the lever |32 has a pivotal Vconnection |35 with thelower bifurcated portion |36 of a vertically disposed bar |31 on whoseupper end a cam roller |30 is rotatably mounted on a stud or pin |39, asbest seen in Figs. 3 and 6.

A web or connecting portion |40, integral with the guide members I I4,is provided to maintain the bar |31 in proper vertical position, so thatthe roller |38 operates in a cam groove |4| formed in one face of a camdisc |42. Said disc is secured to the shaft 34 as by a set screw |43,and thus revolves with said shaft.

The conguration of the cam groove |4| is portrayed in Fig. 6. It isgenerally circular and eccentric to the shaft 34, and is preferably sodesigned that at one stage in each cycle the portion |44 thereof has aparticular function which will be described hereinafter.

` In Fig. 17,` a modified anvil and pressure applying member |19 isillustrated as exemplary of numerous other such members which arecontemplated in conjunction with complementa] forming blocks andcreasing blades. In order that the piece of leather illustrated in Fig.may lie flat on said member I 19, a recess |80 is provided whereby thehead of a mounting screw |29 may be disposed below the plane of theupper surface of said member.

AThe operation of the machine is as follows:

Assuming that the piece of leather 14 of Fig. 13 is to have its edge 13turned andbound to produce the finished edge -15 of Fig. 14, a suitablepaste or cement is rst applied to the surwith the gauge 0|.

The operator now, by pressing the' lever 52 inwardly, causes the clutchmechanism 40 to function so that a single complete revolution of shaft34 is had, whereupon said shaft is automatically arrested, thuscompleting a cycle.

Assuming further that the moving parts of the mechanism are properlycoordinated, the creasing blade 12, through the medium of the roller 64and the cam groove 31, immediately begins to descend, and continues itsdescent until justprior to approximately the mid-cycle it is in theposition portrayed in Fig. 9. At such time, it is seen that the creasingedge of the blade impinges upon the leather adjacent the pasted marginthereof, the resilient portion |23 of the anvil member 19 cooperating tormly grip or pinch the leather between said blade and said portion 23,whereby slippage cf the leather is obviated.

The creasing blade 12 continues its descent until the mid-cycle, theanvil now descending simultaneously therewith through the medium of theroller |33, cam groove |4l, bar|31, lever |32, and plunger |20.

When the mid-cycle point is reached, the free marginal edge 13 of theleather springs outwardly into engagementwith the underside of the lip92 of the forming block. This action isparticularly illustrated in Fig.10.

Next. the creasing blade begins to ascend, and shortly thereafter themember 19 also. In other words, the ascent of the creasing blade isunder way at the time the ascent of the member 10 is initiated. Thisdwell, or stationary interval, is effected by the coniiguration oftheportion |44 of cam groove |4|y portrayed in Fig. 6, so that the relativeposition of the parts at the time the member 19 begins to ascend may beseen in Fig. 11.

Thus far, that is during the movements illustrated in Figs. 8, 9 and 10,the forming block 18 has remained stationary, the concentric portion ofthe cam 38, which cam controls its reciprocaticn in conjunction with theroller H6, bar ||2, lever |04, and plunger 0|, having been in engagementwith said roller.

However, at approximately the time when the Fig. 1l position of theparts obtains, the roller HS is entering the indented portion ||8 of thecam whereby the plate 86 and the forming block '58 mounted thereon arecaused to descend under the action of the spring |20 as is understood.

Thus, by the cooperative movements of the forming block movingdownwardly, and the memher 19.` now functioning as a pressure applyingplate, moving upwardly, the permanent adhesion of the marginal portion13 and the body of leather 14 is effected.

The relative position of the parts at this time is portrayed in Fig. l2.To complete the cycle. the forming block 18, the creasing blade 12, andthe combined anvil and presser plate member 19 are cau-sed to return.respectively, to their Fig. 8 position., whereupon the leather isremoved, and the machine is ready for the reception of a similar pieceto be acted upon.

The advantages inherent in the provision of the resilient component |23of the member 19 are deemed worthy of note. Thus, on the downstroke ofthe blade 12, at which time the member 19 functions as an anvil, varyingthicknesses of 7 leather may .be .accommodated without adiustments ofany kind. The extended lip or supporting ledge E25 obviates displacementof the resilient member i251, which, as stated, is bonded to .andWithin'the groove of the plate 122.

On the upstroke of the plunger |26, at which time the member l!!functions as a pressure plate, .the resiliency inherent in the componentl23 insures that a flexible yet firm application of -iorce is exerted.against the body portion of the leather to eifect the desired result.The resilient feature referred to ha-s been found to be highly eflicientin binding vedges of arcuate or circular configuration.

With reference .to circular configurations, the turning and binding ofthe peripheral edge of a leather disc, .such as that shown ai; |50 inFig. 1,9, obviously requires vthe Ause of a circular creasing blade, asimilar forming block, and a complementa-ry anvil and pressure applyingmember.

In an operation of this kind, it is necessary to mash or crinkle saidperipheral edge as it is forced .through the forming block. In order toaccommodate the excess leather, a, circular series of spaced ndentationsor notches |I, shown in Fig. 20, are provided in the upper surface ofthe here circular lip portion V92 of vthe forming block.

Said indentations or notches l5! are not deep enough to penetrate thelower edge of the lip however, so that the free crinkled peripheral edgeof .the `disc IEil springs outwardly into engagement with the undersideof .said lip, and the re` maining operations are completed as before.

While the invention has been described as applicable to pieces ofleather, it is contemplated that material other Vthan leather could beacted upon by the machine with like results.

Furthermore, it is to be understood that the precise mechanismillustrated and described is subject to modication without departingfrom .the spirit `of my invention, which is characterized by suitablemechanism -that will operate to first crease the leather adjacent theedge to be finished, and subsequently fold and bind said edge to thebody portion of the leather in a single cycle, and with pressure appliedfrom below.

What I claim is:

1. In a machine for 'turning and binding edge portions of pieces ofleather, a forming block including a gauge portion and a projecting lipportion, means for adjustably mounting said block on a verticallyreciprocable plunger, a resilient creasing blade, a supporting blocktherefor, means for adjustably mounting said block von a plate -securedto a vertically reciprocable crosshead member, a combined anvil andpressure plate, means for adjustably mounting same on a verticallyreciprocable plunger, means for reciprocating said first named plunger,said crosshead member, and said second named plunger during a singlecycle of the machine, and clutch mechanism, operable at will, to governthe lbeginn-ing and end of each such cycle.

2. In a machinev for turning and bin-ding edge portions of pieces ofleather, a forming block including a gauge portion and a projecting lipportion, means for adjustably mounting said block on a verticallyreciprocable plunger, a resilient creasing blade, a supporting block;therefor, means for adjustably mounting said block on ,a plate securedto a vertically reciprocable crosshead member, a combined anvil andpres*- sure plate, means for adjustably mounting same on .a verticallyreciprocable plunger, a cam and roller arrangement for vreciprocating.said rst named plunger, a cam and roller .arrangement for reciprocatingsaid crosshead member, a similar arrangement for reciprocating vsaidsecond named plunger, said cam and roller arrangements being -such thatthe reciprocations occur :at predetermined intervals during ra :singleaperating cycle of the machine, and clutch mechanism operable at will'whereby each cycle .of operation is begun and automatically ended.

Y 3. In a machine for turning and -binding edge portions of pieces `ofleather, a forming block anda complemental combined anviland pressuremember adapted to have positioned thereon Va piece of leather whosemarginal portion has been supplied with an adhesive, a gauge included inthe forming block for properly positioning the leather, a resilient:creasing blade adapted to engage and crease said leather vadjacent the.adhesively coated margin thereof in coopera-tion with said anvilmember, a projecting lip portion included in the forming .bloc-k underwhich the free edge of said marginal portion is adapted to engage, theforming block being adjustably mounted on a horizontal plate formed onthe upper end of a plunger Whose vertical movements are governed by acam and roller arrangement, the cam being secured to a horizontal shaftrotatable at will, and the roller being supported in the upper end of avertically slideable bar Whose lower end has a `pivotal connection `with`one endof a pivoted lever, the other end of which is pivotallyconnected to vthe lower portion of said plunger.

4. In a machine for turning .and binding edge portions of pieces ofleather, a forming block and a complemental combined .anvil `andpressure member adapted to have positioned thereon a piece of leatherwhose marginal portion has been supplied with an adhesive, .a ,gaugeincluded in the forming block for properly positioning the leather, aresilient creasing blade adapted to engage and crease said leatheradjacent the adhesively coated margin thereof, in cooperation with saidanvil member, .a projecting lip portion included in the forming blockunder which the free edge of said marginal portion is adapted to.eng-age, lthe forming vblock being adjustably mounted on a horizontalplate formed on the upper end of a plunger whose vertical .movements aregoverned by a cam and roller arrangement, said creasing blade beingattached to a supporting block adjustably mounted on a horzontallydisposed plate secured to a crosshead member whose vertical movementsare governed by another cam and roller assembly, the .cam of the saidassembly being secured to a horizontal shaft rotatable at will, and thecooperative roller rbeing supported on a horizontally .disposed Vstudaffixed to said crosshead.

5. In a machine for turning and binding edge portions of pieces ofleather, a forming block and a complemental combined anvil and pressuremember adapted to have positioned thereon a piece of leather whosemarginalportion has been supplied with an adhesive, a gauge included inthe forming block for properly positioning the leather, a resilientAcreasing blade adapted toengage and crease said leather adjacent theadhesively coated margin thereof in .cooperation with said anvil member,a projecting lip portion -included in the forming .block under which thefree edge of said marginal por-tion is adapted to engage, the formingblock being adj-ustably mounted on a horizontal plate formed on theupper end of a plunger whose vertical movements are governed by a camand roller assembly, said anvil and pressure applying member beingadjustably secured to the upper end of a plunger whose verticalmovements are governed by another cam and roller arrangement, the lattercam being secured to a horizontal shaft rotatable at will, and theroller being supported in the upper end of a vertically slideable barWhose lower end has a pivotal connection with one end of a pivoted leverwhose other end is pivotally connected to the lower portion of saidplunger.

6. In a machine for turning and binding edge portions of pieces ofleather, a forming block and a complemental combined anvil and pressuremember adapted to have positioned thereon a piece of leather whosemarginal portion has been supplied with an adhesive, a gauge included inthe forming block for properly positioning the leather, a resilientblade adapted to crease said leather adjacent the adhesively coatedmargin thereof and to maintain same in firm engagement with a resilientcomponent included in said combined anvil and pressure member, mechanismadapted to cause said creasing blade and said anvil member to descendsimultaneously past a projecting lip portion included in the formingblock, mechanism adapted to cause said forming block to then descendwhile the creasing blade ascends, and mechanism adapted to cause saidanvil and pressure member to then ascend concurrently with the descentof the forming block whereby the body portion of the leather adjacentthe crease is rmly pressed against the adhesively coated marginalportion thereof to produce a smooth finished edge.

7. In a machine for turning and binding the edge portions of pieces ofleather, a combined anvil and pressure member adapted to have positionedthereon a piece of leather whose marginal portion has been supplied withpaste, a complemental forming block including a gauge against which theedge of said marginal portion of leather is placed, a verticallyreciprocable resilient blade member adapted to crimp the leatheradjacent the paste coated margin thereof in cooperation with said anvilmember, a projecting lip formed on the upper anvil-opposing edge of theforming block under which the free edge of the marginal portion isadapted to engage subsequent to the creasing operation to prevent thefold from being withdrawn with the creasing blade, and means forsimultaneously reciprocating said forming block and said pressure memberin opposed directions to firmly press the body portion of the leatheragainst the paste coated marginal portions thereof.

8. A machine for turning and binding the edge portions of pieces ofsheet material including a base, a. first vertically reciprocableplunger working in a cylinder rigid with said base, a forming blockincluding a gauge and a projecting lip por tion adjustably mounted onsaid plunger, a second vertically reciprocable plunger Working inacylinder rigid with said base, a complementary combined anvil andpressure applying member adjustably mounted on a plate integral withsaid second plunger, a housing rigidly mounted on the base, a verticallyreciprocable crosshead working in guideways formed in said housing, aresilient creasing blade adjustably mounted on a platform rigid withsaid crosshead, a rotatable shaft, a cam and roller assembly operatedfrom said shaft for reciprocating said first plunger, a cam and rollerarrangement operated from said shaft for reciprocating said secondplunger, a cam and roller arrangement also operated from said shaft forreciprocating said crosshead, all said reciprocal movements beingregulated to occur at predetermined intervals during one cycle of themachine, and clutch mechanism, operable at will, for placing said shaftin rotation and acting automatically to arrest its rotation followingthe completion of such cycle.

9. A combined anvil and pressure applying member adapted to beadjustably secured to a vertically movable portion of a machine forturning and binding the edge portions of pieces of leather, said membercomprising a slotted plate of metal or the like, a groove or recess inat least one side of the plate, and a member of resilient materialhaving a portion thereof seated within said groove and bonded thereto,and the remaining portion thereof unsecured and extending laterallybeyond the marginal edge of said plate.

10. A combined anvil` and pressure applying member adapted to beadjustably secured to a vertically movable portion of a machine forturning and binding the edge portions of pieces of leather, said membercomprising a slotted plate of `metal or the like, a groove or recess inat least one side of the plate, a member of resilient material having aportion thereof seated within said groove and bonded thereto and aportion thereof unsecured and extending laterally beyond the groove, anarcuate edge formed on said laterally extending portion, and a laterallyextended ledge on said plate defining the bottom of said groove andsupporting the unsecured portion of said resilient member.

LOUIS J. NOECKER.

REFERENCES CITED The following references are of record in the le ofthis-patent:

UNITED STATES PATENTS Number Name Date 2,198,140 Vachon et al Apr. 23,1940 2,198,456 Noecker Apr. 23, 1940 2,280,346 Noecker Apr. 21, 1942

